[Intel-gfx] [PATCH v2 05/10] drm/i915/bdw: Remove WaDisableThreadStallDopClockGating

[Jani Nikula]

On Fri, 25 Sep 2015, Arun Siluvery <arun.siluvery at linux.intel.com> wrote:
> Dropping it because it is for pre-production stepping.

Hum, why have we added a pre-pro w/a without a stepping check... should
we backport this to stable kernels? What's the impact on production
hardware with vs. without the w/a?

BR,
Jani.


>
> Signed-off-by: Arun Siluvery <arun.siluvery at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_ringbuffer.c | 3 ---
>  1 file changed, 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
> index d8fa9d1..0b545cf 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.c
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
> @@ -827,9 +827,6 @@ static int bdw_init_workarounds(struct intel_engine_cs *ring)
>  	if (ret)
>  		return ret;
>  
> -	/* WaDisableThreadStallDopClockGating:bdw (pre-production) */
> -	WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE);
> -
>  	/* WaDisableDopClockGating:bdw */
>  	WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
>  			  DOP_CLOCK_GATING_DISABLE);
> -- 
> 1.9.1
>
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-- 
Jani Nikula, Intel Open Source Technology Center